Augustinus uhlig



(No Model.)

A. UHLIG.

PIANO TUNING PIN.

No. 345,743. Padsented July 20, 1886.

MkW

UNITED STATES PATENT OFFICE.

AUGUSTINUS UHLIG, OF PEGAU, SAXONY, GERMANY.

PIANO TUNING-PIN.

SPECIFICATION forming part of Letters Patent No. 345,743, dated July 20,1886.

(No model.)

T0 at whom it may concern.-

Be it known that I, AUGUSTINUS UHLIG, of Pegau, Germany, have invented anew and Improved Tuning-Pin, of which the following specification is afull, clear, and exact description.

This invention relates to an improved tuning-pin for pianos, whichpermits an accurate adjustment of the tension of the string.

The invention consists in the elements of improvements hereinafter morefully pointed out.

In the accompanying drawings, Figure 1 is a side View of my improvedtuning-pin. Figs. 2, 3, and i are similarviews, partlyin section, ofmodifications. Fig. 5 is a cross-section on the line :r at, Fig. 1. Fig.6 is a similar section on line y g Fig. 3.

IVith particular reference to Fig. 1, the letter (t represents atuning-pin having a wrenchhead at the top, a screw-threaded shank, and apointed end. This end enters a seat formed in the upper end of a hollowblock, b. The block b is notched at its lower end, and is provided witha stud, c, to which the end of the string d is attached. The string (1is carried to the stud 0 through a transverse passage provided in blockI), as shown.

6 is a spiral spring bearing against lower end of block b and pressingsuch block against the pin a. It will be seen that by slightly turningpin a the block b is raised or lowered, to diminish or increase thetension of string (1.

In Fig. 2, the block b is shown to be made with a pointed upper end, tofit within a seat formed at base of pin a.

In Figs. 3 and 4, the parts a b are connected by means of a head on pina entering asocket in block b. The head of pin a is notched for thereception of two pins, f, that pass through block b. In this way theblock b is withdrawn, or raised and lowered,together with the pin a. Inthis modification the spring 6 may be dispensed with.

I do not broadly claim to have invented a tuning-pin which has aseparate block, to which the string is attached, as similarconstructions are shown in Patent No.186,490, granted to G. Morgan,January 23,1877, and also in English Patent No. 9,380 of 1884; but

I do claim-- 1. The combination of pin a and string (2 with hollow blockI), having stud c, and a transverse passage for the string d,substantially as specified.

2. The combination of pin a with block I). having stud c, and with thespring 6, substantially as specified.

3. The combination of pin a, having pointed end, with block b, having aseat for the reception of such end, and with the stud c, and spring e,that crowds the block against the pin, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

AUGUSTINUS UHLIG.

\Vitnesses:

EDMUND BAOI-I, ERNST KAMPP.

